摘要
由于低密度奇偶校验码(LDPC)具有逼近香农(Shannon)极限的优良性能和可实现高速编译码的潜力,使之成为信道编码领域最受瞩目的研究热点之一。主要研究对象是LDPC码的译码算法。先后介绍了LDPC码的基本概念和原理、编译码的结构原理和基于可靠度的迭代大数逻辑译码算法(RBI-MLGD)流程。译码算法是LDPC码的关键,译码复杂度的高低直接影响着系统的实现。通过Visual C++6.0编写该译码算法程序,并对该码字在8比特和4比特的量化参数下进行了算法仿真,结合Matlab 7.1对获得的数据进行画图,得到了针对该码字在RBI-MLGD算法下的译码效果。
Due to the low density parity check code is approaching Shannon limit of good performance and can realize the potential of the compiled code, making it one of the most flamboyant of the popular research fields in channel coding. The main research object is the decoding algorithm of LDPC codes, it introduces the basic concept and principle of LDPC codes, decoding principle and the iteration number logical decoding algorithm process based on the reliability. Decoding algorithm is the key of LDPC codes, decoding complexity directly affects the realization of the system. The decoding algorithm program is written with Visual C＋＋6.0, and the code word at 8 bits and 4 bit under the quantitative parameters of the simulation algorithm is acted.
出处
《邮电设计技术》
2014年第11期57-61,共5页
Designing Techniques of Posts and Telecommunications
